US8842627B2 - Radio base station and mobile communication method - Google Patents

Radio base station and mobile communication method Download PDF

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Publication number
US8842627B2
US8842627B2 US13/582,618 US201113582618A US8842627B2 US 8842627 B2 US8842627 B2 US 8842627B2 US 201113582618 A US201113582618 A US 201113582618A US 8842627 B2 US8842627 B2 US 8842627B2
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Prior art keywords
scheduling
carrier
mobile station
target mobile
radio base
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US20130051337A1 (en
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Kohei Kiyoshima
Naoto Okubo
Hiroyuki Ishii
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NTT Docomo Inc
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NTT Docomo Inc
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0037—Inter-user or inter-terminal allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/52—Allocation or scheduling criteria for wireless resources based on load
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/121—Wireless traffic scheduling for groups of terminals or users

Definitions

  • the present invention relates to a technical field of mobile communication, particularly to a radio base station and a mobile communication method in a mobile communication system used in a next-generation mobile communication technology.
  • WCDMA Wideband Code Division Multiplexing Access
  • HSDPA High-Speed Downlink Packet Access
  • HSUPA High-Speed Uplink Packet Access
  • an “OFDMA (Orthogonal Frequency Division Multiplexing Access) system” is defined for a downlink
  • SC-FDMA (Single-Carrier Frequency Division Multiple Access) system” is defined for an uplink (for example, see Non-Patent Literature 1).
  • the OFDMA system is a “multicarrier transmission system”, which is configured such that each frequency band (carrier) is divided in plural narrow frequency bands (sub-carriers) and communication is performed using each narrow frequency band (sub-carrier).
  • the sub-carriers are closely arrayed while orthogonalizing in a frequency axis, so that it is expected that high-speed transmission can be implemented to enhance a use efficiency of a frequency.
  • the SC-FDMA system is a “single-carrier transmission system”, which is configured such that the frequency band (carrier) of one carrier frequency is allocated to each of plural mobile stations UE (user devices) and the communication is performed using the carrier.
  • the SC-FDMA system an influence of interference between the mobile stations UE can be simply and effectively reduced, and a fluctuation in transmission power can be decreased. Accordingly, the SC-FDMA system is suitable from the viewpoint of low power consumption of the mobile station UE and coverage enlargement.
  • the plural mobile stations UE are configured such that the communication is performed while one or at least two physical channels are shared by the mobile stations UE in both the uplink and the downlink.
  • the channel shared by the mobile stations UE is generally called a “shared channel”.
  • the shared channel is called a “PUSCH (Physical Uplink Shared Channel)” in the uplink
  • the shared channel is called a “PDSCH (Physical Downlink Shared Channel)” in the downlink.
  • PUSCH Physical Uplink Shared Channel
  • PDSCH Physical Downlink Shared Channel
  • the shared channel is called a “UL-SCH (Uplink Shared Channel)” in the uplink, and the shared channel is called a “DL-SCH (Downlink Shared Channel)” in the downlink.
  • UL-SCH Uplink Shared Channel
  • DL-SCH Downlink Shared Channel
  • the shared channel In the mobile communication system in which the shared channel is used, it is necessary to select to which mobile station UE the shared channel is allocated in each sub-frame (in the LTE system, 1 ms), and it is necessary to transmit a signal that the shared channel is allocated to the selected mobile station UE.
  • a control channel used to transmit the signal is called a “PDCCH (Physical Downlink Control Channel)” or a “DL L1/L2 Control Channel (Downlink L1/L2 Control Channel)”.
  • PDCH Physical Downlink Control Channel
  • DL L1/L2 Control Channel Downlink L1/L2 Control Channel
  • the processing of selecting to which mobile station UE the shared channel is allocated in each sub-frame as described above is generally called “scheduling”.
  • the expression that “the shared channel is allocated” may be expressed as “a radio resource is allocated for the shared channel”.
  • Examples of information transmitted by the PDCCH include “downlink scheduling information” and “uplink scheduling grant”.
  • downlink scheduling information examples include allocation information on a downlink resource block related to the downlink shared channel, information on a UE-ID, the number of streams, or a precoding vector, and information on a data size, a modulation system, or a HARQ (hybrid automatic repeat request).
  • uplink scheduling grant examples include information on an uplink resource block related to the uplink shared channel, information on the UE-ID, the data size, the modulation system, or an uplink transmission power, and information on a demodulation reference signal in an uplink MIMO.
  • the “downlink scheduling information” and the “uplink scheduling grant” may collectively be called DCI (Downlink Control Information).
  • Non-Patent Literature 2 The 3GPP studies an LTE-advanced system that is of the communication system succeeding the LTE system. Requirements of the LTE-advanced system are summarized in Non-Patent Literature 2.
  • CA Carrier Aggregation
  • the mobile station UE is configured to be able to transmit an uplink signal using the plural “CCs”, and the radio base station eNB is configured to be able to receive the uplink signal using the plural “CCs”.
  • the radio base station eNB is configured to be able to transmit a downlink signal using the plural “CCs”, and the mobile station UE is configured to be able to receive the downlink signal using the plural “CCs”.
  • the present invention has been made in view of the above problem, and an object of the invention is to provide a radio base station and a mobile communication method, which can effectively perform the scheduling processing when the “CA” is set to be performed.
  • a first aspect of the present invention is summarized as a radio base station configured to be able to perform communication with a mobile station using a primary carrier and a secondary carrier which have different carrier frequencies, the radio base station including: a management unit configured to manage the number of mobile stations corresponding to each carrier; and a scheduling unit configured to perform a scheduling processing to a scheduling-target mobile station, in which the communication is set to be performed, in at least one of the primary carrier and the secondary carrier of the scheduling-target mobile station, based on the number of mobile stations corresponding to each carrier.
  • a second aspect of the present invention is summarized as a mobile communication method for performing communication between a radio base station and a mobile station using a primary carrier and a secondary carrier which have different carrier frequencies, the mobile communication method including a step of: performing, at the radio base station, a scheduling processing to a scheduling-target mobile station, in which the communication is set to be performed, in at least one of the primary carrier and the secondary carrier of the scheduling-target mobile station based on the number of mobile stations corresponding to each carrier.
  • the invention can provide the radio base station and the mobile communication method, which can effectively perform the scheduling processing when the “CA” is set to be performed.
  • FIG. 1 is an entire configuration diagram of a mobile communication system according to a first embodiment of the invention.
  • FIG. 2 is a functional block diagram of a radio base station according to the first embodiment of the invention.
  • FIG. 3 is a view illustrating a scheduling method performed by the radio base station according to the first embodiment of the invention.
  • FIG. 4 is a view illustrating the scheduling method performed by the radio base station according to the first embodiment of the invention.
  • FIG. 5 is a view illustrating the scheduling method performed by the radio base station according to the first embodiment of the invention.
  • FIG. 6 is a functional block diagram of a mobile station according to the first embodiment of the invention.
  • the mobile communication system of the first embodiment will be described with reference to FIGS. 1 to 6 .
  • the mobile communication system of the first embodiment includes a radio base station eNB and a mobile station UE that can perform communication with the radio base station eNB.
  • the LTE also called Evolved UTRA and UTRAN, or Super 3G
  • the LTE-advanced system is applied to the mobile communication system of the first embodiment.
  • the “OFDMA system” is applied to the downlink
  • the “SC-FDMA system” is applied to the uplink.
  • the mobile communication system of the first embodiment is configured so as to be able to perform the “CA”. Specifically, in the case that the mobile communication system of the first embodiment is set so as to perform the “CA”, the mobile communication system is configured to be able to perform communication using the plural “CCs” in the uplink and the downlink.
  • the “CC” corresponds to one system carrier in the LTE system. That is, although the communication is performed using one “CC” in the LTE system, the communication may be performed using the plural “CCs” in the LTE-advanced system.
  • the PDSCH and the PDCCH, which are shared by the mobile stations UE, are used in the downlink.
  • user data of the downlink namely, a normal data signal of the downlink is transmitted by the PDSCH.
  • the data signal may include best-effort packet data, streaming packet data, a control signal, and a voice signal over a VoIP (Voice over IP) or the like.
  • VoIP Voice over IP
  • the best-effort packet data includes packet data for transmitting and receiving a mail and packet data for browsing the Web.
  • control signal is an RRC message.
  • the control signal may be mapped and transmitted by a “DCCH (Dedicated Control Channel)” that is of a logical channel.
  • DCCH Dedicated Control Channel
  • the radio base station eNB uses the PDCCH to notifies, to the mobile station UE, the ID of the mobile station UE that performs the communication using the PDSCH, information (that is, down scheduling information) on a transport format of the downlink user data, the ID of the mobile station UE that conducts the communication using the PUSCH, and information (that is, up scheduling information) on a transport format of the uplink user data.
  • the PDCCH may be called a “downlink L1/L2 control channel”.
  • the PUSCH and a PUCCH Physical Uplink Control Channel, which are shared by the mobile stations UE, are used in the uplink.
  • the radio base station eNB includes a management unit 11 , a scheduling unit 12 , a receiving unit 13 , and a transmitting unit 14 .
  • the management unit 11 is configured to manage the number of mobile stations UE corresponding to each carrier (each CC).
  • the management unit 11 may be configured to manage, as the number of mobile stations UE corresponding to each carrier, the number of mobile stations UE (that is, the number of “RRC connected mobile stations UE”) in each of which an RRC connection is set in each carrier, the number of mobile stations UE of scheduling target candidates in each carrier, the number of mobile stations UE in each of which the uplink user data is stored in a transmission buffer in each carrier, the number of the mobile stations UE each of which is in an active state in each carrier, or the number of mobile stations UE each of which is in a non-DRX (non-Discontinuous Reception) state in each carrier.
  • the number of mobile stations UE corresponding to each carrier the number of mobile stations UE (that is, the number of “RRC connected mobile stations UE”) in each of which an RRC connection is set in each carrier, the number of mobile stations UE of scheduling target candidates in each carrier, the number of mobile stations UE in each of which the uplink user data is stored in a transmission buffer in each carrier, the number of
  • the scheduling unit 12 is configured to perform the scheduling processing to the scheduling-target mobile station UE in a primary carrier (main carrier) of the scheduling-target mobile station UE.
  • the scheduling unit 12 is configured to perform the scheduling processing to the scheduling-target mobile station UE in at least one of the primary carrier and an secondary carrier of the scheduling-target mobile station UE based on the number of mobile stations UE corresponding to each carrier, which is managed by the management unit 11 .
  • the primary carrier means what is called an “anchor carrier”, and the secondary carrier means carriers (CCs) except the anchor carrier.
  • CCs carriers
  • the anchor carrier may be defined as a carrier in which a PDCCH signal in the plural “CCs” is transmitted, a carrier in which a PHICH (Physical HARQ Indicator Channel) signal is transmitted, a carrier in which a “semi-persistent scheduling” is applied and a PDSCH signal is transmitted, a carrier in which the “semi-persistent scheduling” is applied and the PHICH signal is transmitted in response to a PUSCH signal, a carrier in which a paging signal is transmitted, a carrier in which a DCCH signal is transmitted, or a carrier in which measurement is performed.
  • the anchor carrier may be defined as a combination of the above definitions.
  • the scheduling unit 12 may be configured to perform the scheduling processing to a scheduling-target mobile station UE#A only in the primary carrier (carrier # 1 ) of the scheduling-target mobile station UE#A, when determining that the number of mobile stations UE corresponding to the primary carrier (carrier # 1 ) and the secondary carrier (carrier # 2 ) of the scheduling-target mobile station UE#A is greater than a predetermined threshold (that is, during a crowded condition).
  • a predetermined threshold that is, during a crowded condition
  • the scheduling unit 12 may be configured to separately perform the scheduling processing to the scheduling-target mobile station UE#A in the primary carrier (carrier # 1 ) and the secondary carrier (carrier # 2 ) of the scheduling-target mobile station UE#A, when determining that the number of mobile stations UE corresponding to the primary carrier (carrier # 1 ) and the secondary carrier (carrier # 2 ) of the scheduling-target mobile station UE#A is less than the predetermined threshold (that is, during a non-crowded condition).
  • the scheduling unit 12 may be configured to perform the scheduling processing to the scheduling-target mobile station UE#A only in the primary carrier (carrier # 1 ) of the scheduling-target mobile station UE#A, when determining that the number of mobile stations UE corresponding to the secondary carrier (carrier # 2 ) of the scheduling-target mobile station UE#A is greater than the predetermined threshold (that is, during the crowded condition).
  • the scheduling unit 12 may be configured to perform the scheduling processing to the scheduling-target mobile station UE#A in the secondary carrier (carrier # 2 ) of the scheduling-target mobile station UE#A after performing the scheduling processing in the primary carrier (carrier # 1 ) of the scheduling-target mobile station UE#A, when the scheduling unit 12 determines that the number of mobile stations UE corresponding to the secondary carrier (carrier # 2 ) of the scheduling-target mobile station UE#A is less than the predetermined threshold (that is, during the non-crowded condition).
  • the scheduling unit 12 can allocate the excess resource (RB) in the carrier # 2 to the mobile station UE#A in addition to the resource (RB) in the carrier # 1 .
  • the scheduling unit 12 may be configured to allocate all the resources in the secondary carrier to the mobile station UE having a higher priority, or the scheduling unit 12 may be configured to equally allocate the resources in the secondary carrier to the plural mobile stations UE.
  • the scheduling unit 12 may be configured to perform the scheduling processing to the scheduling-target mobile station UE#A only in the primary carrier (carrier # 1 ) of the scheduling-target mobile station UE#A, when determining that the number of mobile stations UE corresponding to the primary carrier (carrier # 1 ) and the secondary carrier (carrier # 2 ) of the scheduling-target mobile station UE#A is greater than the predetermined threshold (that is, during the crowded condition).
  • the scheduling unit 12 may be configured to perform the scheduling processing to the scheduling-target mobile station UE#A while regarding the primary carrier (carrier # 1 ) and the secondary carrier (carrier # 2 ) of the scheduling-target mobile station UE#A as one carrier, when the scheduling unit 12 determines that the number of mobile stations UE corresponding to the primary carrier (carrier # 1 ) and the secondary carrier (carrier # 2 ) of the scheduling-target mobile station UE#A is less than the predetermined threshold (that is, during the non-crowded condition).
  • the scheduling unit 12 is configured to stop the scheduling processing in one of the carrier # 1 and the carrier # 2 , and to perform the scheduling processing in the other.
  • the scheduling unit 12 is configured to regard the resources (RBs) in the carrier # 1 and the carrier # 2 as the resource (RB) in one carrier, and to perform the scheduling processing.
  • the scheduling unit 12 may be configured not to perform the “CA” in the uplink, when a propagation situation in the uplink is degraded between the radio base station eNB and the mobile station UE (for example, a pass-loss is large) even in the non-crowded condition.
  • the receiving unit 13 is configured to receive the PUSCH signal and the PUSCH signal, which are transmitted from the mobile station UE.
  • the receiving unit 13 is configured to receive the signal transmitted from the mobile station UE using the plural “CCs”.
  • the receiving unit 13 is configured to receive the signal transmitted from the mobile station UE using the one “CC”.
  • the transmitting unit 14 is configured to transmit the PDSCH signal, the PDCCH signal, and the PHICH signal to the mobile station UE.
  • the transmitting unit 14 is configured to transmit the signal to the mobile station UE using the plural “CCs”.
  • the transmitting unit 14 is configured to transmit the signal to the mobile station UE using the one “CC”.
  • the mobile station UE includes a control unit 21 , a measurement unit 22 , a transmitting unit 23 , and a receiving unit 24 .
  • the control unit 21 is configured to control whether the “CA” is set to be performed in the mobile station UE.
  • the control unit 21 may be configured to control whether the “CA” is set to be performed in the mobile station UE in response to an instruction through a network, for example, the radio base station eNB or a switching station MME (Mobility Management Entity).
  • a network for example, the radio base station eNB or a switching station MME (Mobility Management Entity).
  • control unit 21 may be configured to control whether the “CA” is set to be performed in the uplink according to the propagation situation (for example, the pass-loss) in the uplink between the radio base station eNB and the mobile station UE.
  • the propagation situation for example, the pass-loss
  • the measurement unit 22 is configured to measure wireless quality of the carrier in a cell during the communication and surrounding cell.
  • the measurement unit 22 may be configured to measure the wireless quality of the plural carriers (the primary carrier and the secondary carrier), even if the control unit 21 decides that the “CA” is not set to be performed.
  • the measurement unit 22 may be configured to issue the instruction to the transmitting unit 23 to transmit a measurement report including a measurement result measured by the measurement unit 22 to the radio base station eNB.
  • the transmitting unit 23 is configured to transmit the PUSCH signal and the PUSCH signal to the radio base station eNB.
  • the transmitting unit 23 is configured to transmit the signal to the radio base station eNB using the plural “CCs”.
  • the transmitting unit 23 is configured to transmit the signal to the radio base station eNB using the one “CC”.
  • the receiving unit 24 is configured to receive the PDSCH signal, the PDCCH signal, and the PHICH signal, which are transmitted from the radio base station eNB.
  • the receiving unit 24 is configured to receive the signal transmitted from the radio base station eNB using the plural “CCs”.
  • the receiving unit 24 is configured to receive the signal transmitted from the radio base station eNB using the one “CC”.
  • the scheduling processing is performed in both the primary carrier and the secondary carrier of the scheduling-target mobile station UE, which allows speed enhancement of peak throughput to be implemented in the scheduling-target mobile station UE with no use of a complicated configuration.
  • the “CA” is not set to be performed during the crowded condition, which allows the processing load to be reduced in the radio base station eNB.
  • the scheduling processing is performed only in the primary carrier, which eliminate necessity to separately manage the data stored in the transmission buffer of the mobile station UE in the primary carrier and the secondary carrier.
  • a first feature of the present embodiment is summarized as a radio base station eNB configured to be able to perform communication with the mobile station UE using the primary carrier and the secondary carrier which have different carrier frequencies (to perform the “CA”), the radio base station eNB including: the management unit 11 configured to manage the number of mobile stations UE corresponding to each carrier; and the scheduling unit 12 configured to perform the scheduling processing to the scheduling-target mobile station UE#A in at least one of the primary carrier (carrier # 1 ) and the secondary carrier (carrier # 2 ) of the mobile station UE#A based on the number of mobile stations UE corresponding to each carrier.
  • the radio base station eNB including: the management unit 11 configured to manage the number of mobile stations UE corresponding to each carrier; and the scheduling unit 12 configured to perform the scheduling processing to the scheduling-target mobile station UE#A in at least one of the primary carrier (carrier # 1 ) and the secondary carrier (carrier # 2 ) of the mobile station UE#A based on the number of mobile stations UE corresponding
  • the scheduling unit 12 may be configured to perform the scheduling processing to the mobile station UE#A only in the primary carrier (carrier # 1 ) of the mobile station UE#A when determining that the number of mobile stations UE corresponding to the primary carrier (carrier # 1 ) and the secondary carrier (carrier # 2 ) of the mobile station UE#A in which the “CA” is set to be performed is greater than a predetermined threshold.
  • the scheduling unit 12 may be also configured to separately perform the scheduling processing to the mobile station UE#A in the primary carrier (carrier # 1 ) and the secondary carrier (carrier # 2 ) of the mobile station UE#A when determining that the number of mobile stations UE corresponding to the primary carrier (carrier # 1 ) and the secondary carrier (carrier # 2 ) of the mobile station UE#A through the scheduling processing is less than the predetermined threshold.
  • the scheduling unit 12 may be configured to perform the scheduling processing to the mobile station UE#A only in the primary carrier (carrier # 1 ) of the mobile station UE#A when determining that the number of mobile stations UE corresponding to the secondary carrier (carrier # 2 ) of the mobile station UE#A through the scheduling processing is greater than a predetermined threshold, and the scheduling unit 12 may be configured to perform the scheduling processing to the mobile station UE#A in the secondary carrier (carrier # 2 ) of the mobile station UE#A after the scheduling processing is performed to the mobile station UE#A in the primary carrier (carrier # 1 ) of the mobile station UE#A when determining that the number of mobile stations UE corresponding to the secondary carrier (carrier # 2 ) of the mobile station UE#A through the scheduling processing is less than the predetermined threshold.
  • the scheduling unit 12 may be configured to perform the scheduling processing to the mobile station UE#A only in the primary carrier (carrier # 1 ) of the mobile station UE#A when determining that the number of mobile stations UE corresponding to the primary carrier (carrier # 1 ) and the secondary carrier (carrier # 2 ) of the mobile station UE#A through the scheduling processing is greater than a predetermined threshold, and the scheduling unit 12 may be configured to perform the scheduling processing to the mobile station UE#A while regarding the primary carrier (carrier # 1 ) and the secondary carrier (carrier # 2 ) of the mobile station UE#A as one carrier when determining that the number of mobile stations UE corresponding to the primary carrier (carrier # 1 ) and the secondary carrier (carrier # 2 ) of the mobile station UE#A through the scheduling processing is less than the predetermined threshold.
  • the number of mobile stations UE corresponding to each carrier may be the number of mobile stations UE in each of which the RRC connection is set in each carrier, the number of mobile stations UE of the scheduling-target candidates in each carrier, the number of mobile stations UE in each of which the data is stored in the transmission buffer in each carrier, the number of mobile stations UE each of which is in the active state in each carrier, or the number of mobile stations UE each of which is in the non-DRX state in each carrier.
  • the scheduling unit 12 may be configured to set the “CA” to be performed to each mobile station UE during the non-crowded condition.
  • a second feature of the present embodiment is summarized as a mobile communication method for performing communication between the radio base station eNB and the mobile station UE using the primary carrier and the secondary carrier which have different carrier frequencies, the mobile communication method including: a step of performing, at the radio base station eNB, the scheduling processing to the scheduling-target mobile station UE#A of the scheduling processing in at least one of the primary carrier (carrier # 1 ) and the secondary carrier (carrier # 2 ) of the mobile station UE#A based on the number of mobile stations UE corresponding to each carrier.
  • the “CA” may be set to be performed to each mobile station UE during the non-crowded condition.
  • Operations of the mobile station UE and the radio base station eNB may be implemented by hardware, a software module executed by a processor, or a combination of the hardware and the software.
  • the software module may be provided in any storage medium, such as a RAM (Random Access Memory), a flash memory, a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electronically Erasable and Programmable ROM), a register, a hard disk, a removable disk, and a CD-ROM.
  • RAM Random Access Memory
  • flash memory a ROM (Read Only Memory)
  • EPROM Erasable Programmable ROM
  • EEPROM Electrically Erasable and Programmable ROM
  • register a hard disk, a removable disk, and a CD-ROM.
  • the storage medium is connected to the processor such that the processor can write and read information in and from the storage medium.
  • the storage medium may be integrated in the processor.
  • the storage medium and the processor may be provided in an ASIC.
  • the ASIC may be provided in the mobile station UE and the radio base station eNB.
  • the storage medium and the processor may be provided as a discrete component in the mobile station UE and the radio base station eNB.
  • the invention can provide the radio base station and the mobile communication method, which can effectively perform the scheduling processing in the case that the “CA” is set to be performed.

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  • Engineering & Computer Science (AREA)
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  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
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PCT/JP2011/054930 WO2011108651A1 (ja) 2010-03-04 2011-03-03 無線基地局及び移動通信方法

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JP6043491B2 (ja) * 2012-03-06 2016-12-14 株式会社Ｎｔｔドコモ 無線基地局及びスケジューリング方法
WO2013145030A1 (ja) * 2012-03-30 2013-10-03 富士通株式会社 無線通信システム、送信局、受信局および無線通信方法
US9380595B2 (en) * 2013-04-26 2016-06-28 Nokia Solutions And Networks Oy Methods and apparatus for communication scheduling
US10334611B2 (en) * 2016-09-22 2019-06-25 Apple Inc. Device, system, and method for carrier aware scheduling
JP6786369B2 (ja) * 2016-12-07 2020-11-18 株式会社Ｎｔｔドコモ 基地局
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